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Selected bond distances [in Å] and angles [°] for 1,2-azaborine cations 3.
| Compound | B-N(1) [Å] | B-C(3) [Å] | B-N(2) [Å] | Ring torsion[a] |
|---|---|---|---|---|
| 3a | 1.418(5) | 1.481(5) | 1.528(5) | 57.1° |
| 3b | 1.413(2) | 1.496(2) | 1.531(2) | 50.5° |
| 3d | 1.416(4) | 1.489(4) | 1.526(4) | 58.0° |
| 3e | 1.423(5) | 1.489(6) | 1.527(5) | 77.8° |
Torsion angle between the 1,2-azaborine and pyridine ring.
